Device for pretreating and/or coating the running surfaces of cylinders

ABSTRACT

A device for providing the running surfaces of the cylinders of internal combustion engines with a reinforcing coating. (e.g., a nickel dispersion layer including silicon carbide). The device is designed to hold and convey the cylinder block using a flow-trough process, and includes a baseplate (2) in which a pump (9) and the supply and discharge equipment (4-6) for the bath liquors are integrated. The device is transportable and enables the device to be used over a series of conventional treatment liquor baths.

FIELD OF THE INVENTION

The invention relates to a device for pretreating and/or coating therunning surface of individual or a plurality of cylinders combined inone unit.

PRIOR ART

A process for producing such a running surface coating is known fromDE-OS 39 37 763. In said process, the cylinder, whose cylinder bores areto be coated, is fitted on the cylinder head side with a sealing plate,on the one hand, and each treatment bath is equipped with a base platehaving the feed and drain devices for the bath liquor, a pump and theassociated controls, on the other hand. For carrying out the coatingprocess, the cylinder fitted with the sealing plate is transported witha suitable transporting system to the bath, and placed there on therespective base plate. The drawback with this process is that eachindividual bath has to be equipped with the same type of base plates,pumps and controls.

SUMMARY OF THE INVENTION

Therefore, the problem of the present invention is to find a device forpretreating and/or producing a running surface coating on cylinders thatassures, in a simple way of engineering, a favorably priced pretreatmentand/or coating of the running surfaces of cylinder bores in thecontinuous-flow process, whereby the individual treatment liquors areconventionally used in the form of a bath series.

The solution to said problem is obtained with a device with the featuresaccording to the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

An exemplified embodiment is explained in greater detail in thefollowing by reference to the drawing according to FIG. 1, which shows aschematized view of the device.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

A device for the pretreatment and/or manufacture of a running surfacecoating on cylinders of internal combustion engines by depositing arunning coating from coating baths, in the present case a nickel-siliconcarbide coating, consists of a device 1 with a base plate 2, the latterhaving a receiving surface 3, on which a cylinder (not shown) rests withits cylinder head side in a sealing way. In accordance with the numberof cylinder bores to be coated, the base plate 2 has the feed openings 4and the pipe risers 5 with the drain bores 6. The bath liquor or liquidused is fed via a manifold 7 and the conduits 8 to the feed openings 4after it has been withdrawn from the bath container 13 via a pump 9, thelatter being integrated in the base plate 2, and the connected suctionpipe 10. For the transport of the base plate 2, the latter is equippedwith suspension means (not shown), which are commonly used and known perse; the power feed for the pump may take place via such means as well.

For carrying out the actual coating process, the pipe risers 5 aremanufactured from known anode metals and connected to electrical feedlines.

So that bath liquor is largely prevented from being dragged along whenchanging from one bath container to the next, provision is made for adrain conduit 11, which can be opened or closed via a valve 12.

With such a design for continuous-flow coating, in connection with whichthe cylinder rests with its cylinder head side directly on the baseplate 2 in a sealing way, and the cylinder bores are connected with thecorresponding feed and drain devices 4 to 6 for the bath liquor, wherebythe base plate 2 is moved by means of its transport suspension from onebath to the next, and there simply placed on the bath container in a waysuch that the suction pipe 10 extends into the bath liquor, a device 1is created in a simple way of engineering which, without any additionalindividual elements of the same type on the individual bath devices,assures coating or flushing or cleaning at favorable cost, becauseprovision is made for such elements only once, the latter beingintegrated in the base plate 2.

I claim:
 1. A device for coating the running surface of an individual ora plurality of cylinders combined in one unit by causing differenttreatment liquors to surge around the surfaces to be coated, thetreatment liquors being externally stored from the device andsequentially fed for producing a nickel dispersion coating, the devicecomprising:a receiving surface (3) for receiving cylinders with theiropen bore ends; at least one feed opening (4) disposed in said receivingsurface for feeding the treatment liquors around the surfaces to becoated; at least one drain device (5-6) disposed within said at leastone feed opening for draining the treatment liquors after coating, saiddrain device extending upward from said receiving surface across theheight of the cylinder to be coated and into the cylinder bore; and apump (9) disposed on said receiving surface and coupled to said at leastone feed opening for feeding the externally stored treatment liquorsinto the cylinder bores.
 2. The device according to claim 1, wherein thedevice is portable.
 3. The device according to claim 1, furthercomprising an open bath container, said device resting on said open bathcontainer during operation.
 4. The device according to claim 3, whereinsaid drain device feeds into said open bath container.
 5. The deviceaccording to claim 4, further comprising a suction pipe (10) connectedto said pump, said suction pipe being immersed in the treatment liquorscontained within said open bath container.
 6. The device according toclaim 1, wherein said at least one drain device (5-6) comprises a piperiser (5) and a drain opening (6), said pipe riser (5) being an anodemetal.